Daewoo 529B Service Manual
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Daewoo 529B Service Manual

Daewoo 529B Service Manual

Xga color monitor
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Service Manual
XGA COLOR MONITOR
Model : 529B
DAEWOO ELECTRONICS CO., LTD
OVERSEAS SERVICE DEPT.

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Summary of Contents for Daewoo 529B

  • Page 1 Service Manual XGA COLOR MONITOR Model : 529B DAEWOO ELECTRONICS CO., LTD OVERSEAS SERVICE DEPT.

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS GENERAL SAFETY INFORMATION SERVICING PRECAUTIONS TECHNICAL INFORMATION GENERAL INFORMATION PIN CONNECTOR CAUTIONS FOR ADJUSTMENT AND REPAIR OPERATION AND ADJUSTMENT ALIGNMENT PROCEDURE TROUBLESHOOTING HINTS BLOCK DIAGRAM PCB LAYOUT SCHEMATIC DIAGRAM EXPLODED VIEW & MECHANICAL PARTS LIST INFORMATION OF PART DESCRIPTION ELECTRICAL PARTS LIST...

  • Page 3: Safety Precautions

    X-ray, shock, fire, or other hazards. Do not modify the original design without getting a written permission from DAEWOO ELECTRONICS CO. or this will void the original parts and labor warranty.

  • Page 4: General Safety Information

    GENERAL SAFETY INFORMATION Terms in the manual CAUTION Statements identify conditions or practices that could result in damage to the equipment or other property. WARNING Statements identify conditions or practices that could result in personal injury or loss of life. Terms as marked on equipment CAUTION Statements immediately indicate a personal injury hazard as one reads the marking or a...

  • Page 5: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing instruments covered by this service manual, its supplements and addendum, read and closely follow the SAFETY PRECAUTIONS of this manual. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 1 of this manual, always follow the safety precautions. Remember: Safety First.
  • Page 6 Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. The examples of typical ES devices are integrated circuits, some field-effect transistors and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.
  • Page 7 FIGURE 1. USE SOLDERING IRON TO PRY LEADS IC Removal/Replacement Some utilized chassis circuit boards have slotted (oblong) holes through which the IC leads are inserted and then bent flat against the circuit foil. When holes are slotted, the following technique should be used to remove and replace the IC.

  • Page 8: Technical Information

    Power IC, Transistor or Devices Removal/Replacement 1. Heat and remove all solders from the device leads. 2. Remove the heatsink mounting screw (if applicable). 3. Carefully remove the device from the circuit board. 4. Insert new device in circuit board. 5.

  • Page 9: General Information

    GENERAL INFORMATION This color monitor automatically scans all horizontal frequencies from 30KHz to 70KHz, and all vertical frequencies from 50Hz to 160Hz. This color monitor supports IBM PC, PC/XT, PC/AT, personal System/2 (PS/2), Apple Macintosh, and compatible users crisp text and vivid color graphics display when using the following graphics adapters : (VGA, 8514/A, Super VGA, VESA and XGA and Apple Macintosh Video Card).

  • Page 10: Pin Connector

    PIN CONNECTOR Signal Green Blue GND - Red GND - Green GND - Blue +5Vdc Arrangement of 15-pin D-sub connector GND - H.Sync GND - V.Sync Bi-directional Data (SDA) Horizontal Sync Vertical Sync (VCLK) Data Clock (SCL) CAUTIONS FOR ADJUSTMENT AND REPAIR •...

  • Page 11: Operation And Adjustment

    OPERATION AND ADJUSTMENT Control Panel • Move cursor to the right window on the OSD window. • Increase the value of any selected function. • Move cursor to the left window on the OSD window. • Decrease the value of any selected function. •...

  • Page 12: Hot Key

    Key Process MENU Start • When you choose the icon on the OSD window, you can exit the OSD screen. Hot Key BRIGHTNESS CONTRAST...

  • Page 13: Osd Functions

    OSD Functions ICON CONTROL FUNCTIONS Adjust the left and right margins for more convex or more concave margins. PINCUSHION Adjust the trapezoid of the screen by moving the lines inward or outward. TRAPEZOID Adjust the side balance when the sides of the screen are bowed towards left or PIN BALANCE right.
  • Page 14 ICON CONTROL FUNCTIONS Select language for OSD (5 languages). LANGUAGE Reset the screen to the Factory Preset Display Settings. RECALL...

  • Page 15: Alignment Procedure

    ALIGNMENT PROCEDURE Standard Adjustment Conditions 1. Power source voltage: 100-240Vac 50/60Hz 2. Aging: Take at least 20 minutes warm/up time. 3. Signals Video : Analog 0.7Vpp 75Ω terminal positive polarity Synchronizing : TTL level Negative/Positive Separate/composite Deflection frequency Horizontal Frequency : 30KHz - 70KHz Vertical Frequency : 50Hz - 160Hz Pre-Adjustment 1.
  • Page 16 (h) Set the brightness control to the center and adjust the sub contrast control to get the screen luminosity from 33Ft/L. (i) Check if the x, y coordinates of color analyzer is in x=0.281±0.015, y=0.311±0.015. If the color coordinates is out of range, adjust the R. G. B BIAS & GAIN to get the coorinates in x=0.281, y=0.311.

  • Page 17: Troubleshooting Hints

    TROUBLESHOOTING HINTS 1. No Character No Character Are the Change the Contrast & Contrast & Brightness control value to Brightness Controls maximum maximum? Is whole Refer to No Raster screen bright? No Raster Is CRT Check the peripheral circuit Cathode (Rk, Gk, Bk) of CRT signal level normal?
  • Page 18 2. No Raster No Raster Is Heater Is CRT Trouble in Voltage (CRT PWB) heater red-hot? about 6V? Increase the Brightness Trouble in Refer to trouble in power supply & Contrast control level power supply unit. circuit fully Maximum Trouble in Is whole power supply screen bright?
  • Page 19 3. A Missing Color One color is missing Is input signal Check video signal normal? cable or video card 0.7Vpp Is the output of Trouble in IC801 or its pre-amp IC801 ambient circuit pin 14,16,19 all normal? Is video Trouble in output Q801, Q831, Q861 Cathode (Rk, Gk, Bk) video output...
  • Page 20 4. Abnormal OSD Font Abnormal OSD Font * If menu key selected. Is menu key the Fast Trouble in selected? Blanking signal Q801,831,861 or its Is OSD Font (IC204 pin12) ambient circuit exist? normal? Trouble in One color is IC801 and its missing ambient circuit Is the...
  • Page 21 5. Horizontal Output Circuit MODE B+ Voltage 73.2V dc Trouble in Horizontal output circuit 54KHz 117.4V dc (No Raster) 68KHz 148.9V dc Refer to trouble Trouble in power B+ line voltage in power supply supply circuit normal? unit Q505 base Trouble in FBT waveform normal?
  • Page 22 6. Unstable Picture 6-1. Horizontal Unstable picture Is the Trouble in IC501 pulse of pin 15 of or its ambient the IC501 circuit correct? Is the pulse of pin 33 of Check IC201 and the IC201 its ambient circuit correct? 5Vpp Is the Check IC201 and...
  • Page 23 6-2. Vertical Unstable picture Is the 12Vdc Refer to P. S. U line voltage correct? Is the pulse of pin 4, 6 of Trouble in the IC401 vertical D. Y correct? 40Vp-p Is the output Check IC401 and of pin 12,13 of IC501 its ambient circuit all normal? Check the IC501 and...
  • Page 24 7. Focus Monitor remains unfocused Check Focus VR in focus acceptable? Trouble in Focus circuit (FBT)
  • Page 25 8. Convergence Poor convergence convergence Adjust static on the center area convergence bad? Refer to Adjustment procedure for convergence convergence on the Adjust D.Y fringe area bad? Location...
  • Page 26 9. Abnormal Picture * At first, adjust controls in the OSD Menu 9-1. Horizontal Size Abnormal H.Size Is the Is the Check the Q515, DC level of the DC level of pin 11 Q516 and its base of Q517 with the IC501 ambient circuit changeable? changeable?
  • Page 27 9-2. Vertical Size Abnormal V.Size Is the Check the IC501 DC voltage with and its IC501 pin 12,13 changeable? ambient circuit Is the DC voltage with IC401 pin 4,6 changeable? Trouble in Vertical Output Circuit Refer to Vertical Output circuit...
  • Page 28 10. Side-Pincushion Circuit Side-Pincusion distortion is excessive or barrel Select the side-pincushion icon in OSD menu, and adjust to acceptable position. Is the Check the Q515, Q517 waveform of IC501 and its ambient circuit (pin 11) correct? Trouble in H.V Sync...
  • Page 29 11. Power Supply Unit (P.S.U) Trouble in P.S.U Is the power switch Switch on Check the power cord outlet fuse F001 and diode D001,D002,D003,D004 O.K? Is the IC001 Replace IC002 O.K? Trouble in bridge diode voltage of T001 D001 or peripheral pin 8 130V device (270V)?
  • Page 30 Is voltage of C108 set at Trouble in D104, T001 22Vdc? voltage of IC103 Trouble in D106, pin 3 set at Q103 or IC103 12Vdc? Trouble in IC102, voltage of IC102 D103 pin 3 set at 5Vdc? P.S.U O.K...

  • Page 31: Block Diagram

    BLOCK DIAGRAM...

  • Page 32: Pcb Layout

    PCB LAYOUT Main PCB Component Side...
  • Page 33 Main PCB Solder Side...
  • Page 34 CRT PCB Component Side CRT PCB Solder Side...

  • Page 35: Schematic Diagram

    SCHEMATIC DIAGRAM Power & Connection section...
  • Page 36 Control & Vertical Out section...
  • Page 37 Horizontal section...
  • Page 38 Video section...

  • Page 39: Exploded View & Mechanical Parts List

    EXPLODED VIEW & MECHANICAL PARTS LIST...

  • Page 40: Information Of Part Description

    INFORMATION OF PART DESCRIPTION Important Safety Notice Components identified with the International Symbol have special characteristics important for safety. When replacing any components, use only manufacturer’s specified parts. Abbreviation of Description RESISTOR Description Allowance ± 1% ± 5% ± 10% ±...

  • Page 41: Electrical Parts List

    PCB MAIN T=1.6*246*310 C216 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 0001 9979800514 PCB CRT CMC-529B T=1.6*136*105 C217 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 B001 5PB13890-- COIL BEAD BI3890 C220 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012...
  • Page 42 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC C529 CMXF2G154J C MYLAR MPP 400V 0.15MF J C892 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 C530 CMYF2D684J C MYLAR 200V MPP 0.68MF J C893 CEXF1C221V C ELECTRO 16V RSS 220MF (8X11.5) TP C531 CMXF2D274J C MYLAR 200V MPP 0.27MF J (TP) C895 CMXM2A103J C MYLAR...
  • Page 43 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC D563 D1N4004--- DIODE 1N4004 IC501 1TDA4856-- IC H.OSC TDA4856 D565 DZN4148--- DIODE 1N4148 AUTO 52MM IC801 1KA2143B-- IC VIDEO PREAMP KA2143B D566 DZN4148--- DIODE 1N4148 AUTO 52MM L501 5CPZ568K03 COIL PEAKING 0.56UH K (AXIAL 7MM) D567 DZN4148--- DIODE 1N4148 AUTO 52MM...
  • Page 44 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC Q703 TZTA1270Y- KTA1270Y(AUTO)(562Y) R223 HRFT101JCA R CHIP 1/10 100 OHM J 2012 Q801 TBFQ225--- BFQ225 R224 HRFT202JCA R CHIP 1/10 2K OHM J 2012 Q802 TPH2369--- PH2369 R225 HRFT101JCA R CHIP 1/10 100 OHM J 2012 Q803 TBFQ221--- BFQ221 R226 HRFT202JCA R CHIP...
  • Page 45 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC R506 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R580 RD-AZ824J- R CARBON FILM 1/6 820K OHM J R507 HRFT122JCA R CHIP 1/10 1.2K OHM J 2012 R581 RD-4Z153J- R CARBON FILM 1/4 15K OHM J R508 HRFT472JCA R CHIP 1/10 4.7K OHM J 2012 R582 RD-AZ154J-...
  • Page 46 1/4 22 OHM J SW501 5S80303001 SW LEVER P12T21 R875 RC-2Z470J- R CARBON COMP 1/2 47 OHM J T001 5RM0000098 TRANS SMPS DMT-529B R877 RD-AZ105J- R CARBON FILM 1/6 1M OHM J T002 5RY0000003 TRANS SYNC DST-602 R878 HRFT104JCA R CHIP...
  • Page 47 DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPOGU, SEOUL, KOREA. C.P.O. BOX 8003 SEOUL KOREA TELEX: DWELEC K28177-8 CABLE: "DAEWOOELEC" FAX: 02) 590-6291 TEL: 02) 360-7114/590-6151~5 http://www.dwe.daewoo.co.kr PRINTED DATE: AUGUST.1999...

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